Carbureter.



H. W. ALLEN. CARBURETER.

APPLICATION FILED MAY 25, 1915.

MTA/8858.- v I A TTORIVE YS H. W. ALLEN.

CARBURETER. APPLICATION FILED MAY 2s. |915.

- Patented May 3(7), 1916.

v 2 SHEETS-ySHEET 2- J2 2 l 215 4 Baai'.

' A TTOHIVEYS HERBERT W. ALLEN, 0F COALINGA, CALIFORNIA.

QARBURETER.

Specification of Letters' Patent.

Patented May so, 191e.

Application filed May 25, 1915. p Serial No. 30,274.

To all whom it may concern:

Be it known that I, HERBERT WV. ALLEN,

.a citizen of the United States, and a resi- `may be adjusted with respect to each other independently, and wherein the carbureter is provided with other mechanism for thoroughly and intimately mixing the charge to provide a uniform homogenous mixture.

In the drawing, Figure 1 is a vertical section of the improved carbureter, with the parts in position for slow ruiming; Fig. 2 is a cross section on the line 2 2 of Fig. 1; Figs. 3 and a1 are sections on the lines 3 3 and 1 -4, respectively,rof Fig. 1; Fig. 5 is a partial vertical section at right angles to Fig. 1; Fig. 6 is a section on the line 6-6 of Fig. 5; and Fig. 7 is a perspective view showing the clutch mechanism with the parts separated.

The embodiment of the invention shown in the drawings comprises an outer casing consisting of integral portions 1 and 2 of unequal diameter, the portion. 2 being of greater diameter than the portion 1, and the said portions are (zo-axial, the portionl 2 being simply an enlargement of the portion 1. It will be noted that the two portions merge gradually into each other, and the portionl is externally threaded at-its lower end as indicated at 3, while the portion 2 is inter? nally threaded at its upper end, as indicated at f1.

-The portion 2 has a lateral nipple 5, and this nipple has a marginal flange or rib 6, which is adapted to abut vagainst a similar A rib 7 on a pipe S leading to the engine,

.and a gasket or packing ring 9 is arranged between the flanges for making a' Huid tight joint. l I

It will be noted from an inspection of Fig. 1, that the portion 2 is provided intermediate its ends with an internal annular enlargement 10, the said enlargement eX- tending entirely around the said portion.

A two-part sleeve is arranged withinithe outer casing, the said sleeve comprising in-y tegral portions 11 and 12 of'unequal diameter, the portion 12 being of greater diam` eter than the portion l1, and the said pory tions are integral as shown. The portion 1 1n the outer casing has an internal coarse thread 13 near its connection with the portion 2, and the portion 11 of the sleeve has a` similar external thread 14 engaging the thread 13 and coperating therewith, to move the sleeve .longitudinally with respect to the casing when the sleeve is rotated in the casing.

The upper or large portion 12 of the y sleeve is adaptedto lit roughly within the portion 2 of the outer casing, and thus said portion 12 lits between inner and youter flanges 15 and 16 arranged within the portion 2 of the casing, and connected to a head 17 which fits against the upper Aend of the portion 2 of the vouter casing.l 'The outer flange 16 is externally threaded at its connection with the head to engage the threaded portion 4 of the outer casing.

The flanges 15 and 16 are spaced apart from eachother a sufficient distance toreceive the portion 12 of, the sleeve between the same, and the said flanges 15 and 1,6 have annular series of registering ports 18. The portion 12 of the sleeve has an annular series of ports`19, which are adapted to register with the ports 18 when the sleeve is at the end of its movement toward the head 17, and to be out of register or almost out of register with the ports 18 when the valve or sleeve is at the end of its movement in the opposite direction. Each of the ports 18 and 19 is covered by a screen 20, of suitable mesh, the said screen being held in place in .any suitable manner, and it will be noted that the ports 18 are at the enlargement 10 of the portion 2 of the outer casing.

The flange 16 extends beyond the flange 15, and the lower or inner edge of the said munication'between the said space 10 and the interior f the valve 11-12 is by way of the ports 18 and 19.

The valve or sleeve 114-12 is moved longitudinally of the casing 1-2, by turning the said valve in the casing. rllhe coperating threads 13 and 14 will move the valve longitudinally with respect `to the casing when the valve is turned, and the valve is turned by meansv of a tubular shaft 22, which isjournaled within a hub 23 integral with the head 17, and extending inwardly around the tubular shaft 22. This shaft 22 has an annular outwardly facing shoulder 24 near its lower end, and the inner end of the hub 23 abuts against this shoulder. The shaft 22V 1is oscillated in a manner to be presently described, and said-shaft has aslidable connection with the "valve, for constraining the valve' to rotate with the sha-ft. This connection is by way of oppositely extending arms 25, each of vwhich is vertically slotted at its outer end or forked, as indicated at 26, andribs or vanes 27 extending inwardly from the valve are received in the slots. 4

It will be evident that when the shaft 22 is rotated, the arms 25 by their engagement with theribs 27 will rotate the valve"l1l2 therewith, and because of the threaded engagement between the valve and the casing the valvel will be moved longitudinally of the casing. `When the valve is so moved, the ports 19 of the valve lwill be brought more or less into register with the ports 18 of the flanges to permit a greater or less amount oi mixture to pass fromthe interior of the valve to the annular passage 10 and from thence to the engine.

A fuel chamber in the forni olix an annular casing 28 is connected with the lower end of the portion l of the casing 1 2, the said casing being internally threaded at its upper end, as indicated at 29, to engage the threads 3 of the casing 1 2.

A cover 30 is provided for the casing, and the said casing has a diametrical tubular connection 31, through which the fuel may pass from one side oi' the casing to the other. This passage or tubular connection 31 conimunicates by a port 32 with the interior et la valve casing 33 which is arranged-at the axis or center of the fuel chamber. This casing is internally threaded for engage ment by the body portion 34- of a' spray valve seat, and the said seat has a marginal flange or rib 35 extending outwardly. to the outer surface of the casing' 33. This casing has a hollowor double wall, as shown, and the passage or portl32 opens at the center 'of the casing There is a space between the peripheryof the casing 33 and the internal sur'aeeof the-casing 28, to permit the paslsage of airup around the ,valve casing` and between the'same and thecasing 2 8 into the ideama `lower end of the valve l1-12. The said lower end is open, and the rib 35 of the valve seat is of thevsame diameter as the portion 1l of the valve, s o that the periphery ci this portion of the valve is flush with the periphery of the rib The upper end of the valve seat is re- 'cessed as shown at 3G, and at the top oi the recess the seat is beveled, to coperate with the beveled portion 37 of a valve. The beveled portion 37 of the valve is inclined at the same angle the beveled upper end of the recess, so that when the valve is atits lowest point the beveled surfaces will abut to close the opening between the recess and the interior of the valve 1`l-12.

rlhe valve has a rib 38 extending beyond these openings or passages, and that the series encircle an internally threaded opening, which is engaged by a depending threaded stein l0 extend ing axially from the valve 37-38 *The valve is also provided with an upwardly extending axial stem 4l,- which passes through the tubular shaft 22 and the hub 23 to a point above the 'upper end of the said tubular shaft.

A tloat is arrangedv within. the fuel chamber 28, the said float being in the form of a hollow split ring, and 'the oat is pivoted at dialnetrically opposite points to the arms 43 of a yoke comprising the said arms and a body del. Thearins 43 of the yoke form a continuous arc-shaped member, having at each end a bearing lug 45, which is received between a pair of bearing lugs i6 on the upper surface of the float, and a pivot pin is passed through each pair ci lugs and the adjacent bearing. l

The body del oi" the yoke extends beyond the ring at the split, and into a nipple 47. extending radially from the fuel casing, the outer end of the nipple vbeing normally closed by a plug` 4S. Intermediate its ends the body of the yoke is provided with -a transverse hub 49, which ts upon a journal pin 50 arranged diamctrically of the .nipple 4:7, and the yoke is thus mounted to swing on the journal pin. y

A link 51 is pivo'ted at its upper end to the outer end of the body 44E of the yoke, with ay pin and sl'ot or lost motion connee tion, indicated at 52, and the link extends downwardly through the wall of the nipple into a valve casing 52 interposed vin' the length of the su ply pipe 53 which conducts the fuel to the "nel chamber, openingat the bottom of said chamber. as shown.

Stufling boxes 54 and 55 are arranged in the wallk of the nipple and in the top of the valve casing through which the link 51 passes, and the lower end of the link carries a. conical valve 56, which cooperates with a similar valve seat in a diaphragm 57 eX# tending transversely of the valve casing.v

the float moves downwardly, the valve will be opened.

A handle 58 is 1connected to the upper end of the tubular shaftl 22, the said handle hav- .ing a split bearingl 59 which fits over the upper end of the shaft. The ends of the bearing .have radial lugs 6 0 which are engaged by a set screw61, by means of which the lugs may be moved toward or from each other" to clamp the split bearing on they shaft, or shaft. y

A cup-shaped member 62'is arranged at the top -of the shaft, the cup-shaped member havingv a Adepending hub portion 63 which fits within the shaft, between the upto releasey the 'bearing from the per end of the valve stem 41 and the intev rior of the shaft. Atits top5the cup-shaped member 62 is provided /with oppositely arranged longitudinally czitending slots 64, and these slots'are engaged by a cross pin 65 arranged transversely of the top of the stem 41,- and it will be [noted that a ring 66 is secured to the top of the stem by means ofthe cross pin, said ring being a smooth fit within the cup-shaped member, and filling the spacev between the interior thereof and the eXterio-r of the valve stem 41.

The upper face of the split bearing 59 has an annular series of radial notches 67, which are adapted to be engaged by teeth 68 on the lower end of the cup-shaped member 62. The teeth, 6 8 are two in number and at diametrically opposite points, and these teeth are shaped to fit and fill the notches 67.

A coiled spring 69 is arranged within the cup-shaped member between the ring 66 and the bottom of the cup shaped member, and this spring 4acts normally to press the valve stem 41 and the valve 3 The handle 58 is connected by means of a link 70 to suitable operating mechanism, (not shown) for moving the said linklongitndinally to swing the arm or handle 58 in a direction to open or close the valve 's as follows: The fuel may pass freely from 38 upward.Y

the fuel chamber 28 by way of the diametrical passage 31 and the port 32 to the interior of the valve casing 33 and by way of the ports39 to the recess or well 36. Then the valve 37-38 is opened, the air rushing in through the annular fuel chamber 28 willl pass upward around the casing 33, and over the rib 35 into the lower end of the valve 11-12. This air as it passes over the space between the valve 37-38 and the topof the seat will take up a portion of the fuel, and will carry it on up through the valve 11-12 and through the openings or ports 18-19, to the annularpassage 10, and from thence to the engine.

Tt will be noted that the valve casing 33 is connected to the interior or inner surface of the casing 28, by radial arms 71, and these arms a'respaced apart a sufficient distance to provide a free flow of air to the interior of the valve 11 12. The level of the fuel in the well or recess 36, will depend upon the level in thechamber 28, and this level is maintained at a predetermined point by the float valve. Hence there will be at lall times la fixed level of the fuel in the aspirating well 36. This air following the course of the arrows in Figs. 1 and 5, and

charged with the fuel, passes to the engine, f

-being thoroughly mixed and made hoinogeneous by its passage thro-ugh the screens 2O in the ports 18 and 19. Whenever the piston ofthe engine moves in one direction, a partial vacuum is created in the pipe 8, and the air will rush through the valve 11--12.

The valves`37-38 and 11-12 are operated in unison. The said valves are suitably adjusted, independently of each other, by releasing the handle 58 from the stem. This is done by lifting the cup-shaped member, the spring69 permitting the 'said member to be lifted to bring the teeth 68 outv of engagem'entwith the notches 67. YVith the cup-shaped member disengagedfrom the handle 58 the valve 11-12 may be turned to provide for the proper amount of opening between the inner end of the said valve and the rib The stem 41 is adjusted to secure the proper opening between the valve 37 and the aspirating well, after which the teeth of the cup-shaped member are permitted to engage with the notches 67. Vhen now, the handle 58 is moved in either direction, the valves 37438 and 11-12 operate in unison. It will be noted from an inspection of Fig. 2 that those portions of the sleeves and the valve between the openings 18 and 19 are beveled at the inner faces of the sleeves and valves. The said portions p which are in fact bridges between'the open- -ings are triangular in cross section and have their apices inward. This arrangement permits a full opening of the ports at all posi-` tions of the valve and the sleeves. All of the screens it will be noted are let into rab bets which extend entirely aroundthe open* ings and they may be soldered in place if desired.

.l claim:

l. A carbureter, comprising concentric inner and outer casings, an annular fuel chamber connected to the outer end of the outer casing outside of the saine, said chamber having a fuel well at the of the casing and connected to the chamber, a valve seat in the well and having an aspirating well in itstop and having passages leading to the fuel well, the in ner casing being adapted to lit at its inner end against the seat to close the said inner casing, a valve litting the aspirating well and having a stem extending bevond the inner end of the casings, said casi-ngs having a threaded engagement for constraining one of them to move longitudinally with respect to 'the other when the inner casing is turned .in either direction, a tubular shaft encircling the stem and having a. sliding engagement with the inner casing for 'constraining the said casing to rotate with the shaft, a radial arm connected to the tubular shaft for turning the said shaft, releasablc clutch mechanism between the said arm and stem' for constraining the stein to turn with the tubuister with the ports of the flanges when the inner casing is moved in Vone direction and to move out of register with the said ports when the inner casing is moved in the opposite direction, and a screen in each port.

2. A carbureter, comprising concentric inner and outer easings, an annular fuel cham- -her connected to the outer end of the outer casing outside of the same, said 'chamber having a fuel well at the axis of the casing and connected to the chamber,a valve seat in the well and having an aspirating well in its top and having passages leadingto the fuel well, the inner casing'being adapted to fit at its inner end against the seat to close the said inner casing, a valve fitting the aspirating well and having a stem extending beyond the inner end of the casing, said casings having a threaded engagement for constraining one of them 'to move longitudinally with respect to the other when the inner casing` is turned in Aeither direction, a tubular shaft encircling the stem andv having a sliding engagement with the inner casing for constraining the said casing. to rotate the shaft, a radial arm connected to the tubular shaft for turning the same, releasable clutch mechanism between the said arm and stem for constraining the stem to turn the tubular shaft, the outer casing having an outlet for the mixture at its inner end, and means in connection with the casings for thoroughly mixing the same.

3. A carbureter, comprising concentric inner and outer casings, the outer casing supporting a valve seat having an aspira-ting well at the lower end of the said casing, and the inner casing being adapted to it against the seat to close the said inner casing, a valve for closing the aspirating well and having a stem extending beyond'the in` ner end of the casing, said casing having a threaded engagement for constraining one of 'HERBERT w. ALLEN.

Witnesses G. H. SNYnnR, W. G. STUBBS. 

